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Thread: How to create custom slot in Qt Designer 4.1?

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  1. 13th January 2006, 02:10 #1
    GreyGeek
    GreyGeek is offline Intermediate user
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    Default Re: How to create custom slot in Qt Designer 4.1?

    OK, here are some excepts of my Homestead app that do what I believe you want to do. This code throws up a dialog which contains a list of wholenames selected from a SQL select of type form "LIKE partialname%". Clicking on the proprty_id column and/or the ssn column selects that property or that individual. Clicking the OK or Cancel button closes the dialog.

    Here is the wholenamedlg.h header file:
    Qt Code: 
    1. #ifndef WHOLENAMEDLG_H
    2. #define WHOLENAMEDLG_H
    3. .... snip includes ..........
    4.  
    5. #include "ui_wholenamedlg.h"
    6.  
    7.  
    8. class wholenamedlg : public QDialog
    9. {
    10.     Q_OBJECT
    11.  
    12. public:
    13. 	wholenamedlg(QWidget *parent = 0, QString partName = "", QString strYear = "2006", QString strSpouseFlag = "F");
    14. 	QString resultSSN;
    15. 	QString resultPropID;
    16. 	QTableView wholeNameView;
    17.  
    18. private:
    19. 	Ui::wholeNameDlgUI wnui;
    20.  
    21. private slots:
    22. 	void copyVALUES(const QModelIndex &);
    23.  
    24. };
    25.  
    26. #endif
    To copy to clipboard, switch view to plain text mode 
    "wholeNameDlgUI" is the name given to the dialog during the Designer session.


    Here is the wholenamedlg.cpp file which displays the dialog grid:
    Qt Code: 
    1. /*
    2. Program:		wholenamedlg.cpp
    3. Description:	A dialog class for picking an SSN and/or a name out of 
    4. 		a query  created by the SQL LIKE % syntax.
    5. Author:			Jerry L Kreps
    6. Date:			11/10/05 - ff
    7. */
    8.  
    9. #include "wholenamedlg.h"
    10. ... snip includes ......
    11.  
    12. wholenamedlg::wholenamedlg(QWidget *parent, QString partName, QString strYear, QString strSpouseFlag)
    13. : QDialog(parent)  
    14. {
    15. 	wnui.setupUi(this);
    16.  
    17. 	connect(this->wnui.wholeNameView,	SIGNAL(clicked(QModelIndex)),	this,	SLOT(copyVALUES( QModelIndex )));
    18.  
    19. 	partName.prepend("'");
    20. 	partName.append("'");
    21. 	QString queryStr = "SELECT proprty_id,ssn,wholename,sssn,sname,city,address FROM persinfo_";
    22. 	queryStr.append(strYear);
    23. 	if (strSpouseFlag == "F") {
    24. 		queryStr.append(" WHERE wholename LIKE ");
    25. 		queryStr.append(partName);
    26. 		queryStr.append(" ORDER BY wholename");
    27. 	} else {
    28. 		queryStr.append(" WHERE sname LIKE ");
    29. 		queryStr.append(partName);
    30. 		queryStr.append(" ORDER BY sname");	
    31. 	}
    32. 	QSqlQueryModel *viewModel = new QSqlQueryModel(wnui.wholeNameView);
    33. 	viewModel->setHeaderData(0, Qt::Horizontal, "ID");
    34. 	viewModel->setHeaderData(1, Qt::Horizontal, "SSN");
    35. 	viewModel->setHeaderData(2, Qt::Horizontal, "WholeName");
    36. 	viewModel->setHeaderData(3, Qt::Horizontal, "SSSN");
    37. 	viewModel->setHeaderData(4, Qt::Horizontal, "SName");
    38. 	viewModel->setHeaderData(5, Qt::Horizontal, "City");
    39. 	viewModel->setHeaderData(6, Qt::Horizontal, "Address");
    40.  
    41. 	viewModel->setQuery(queryStr);
    42. 	if (viewModel->lastError().type() == QSqlError::NoError){
    43. 		wnui.wholeNameView->setModel(viewModel);
    44. 		if (viewModel->rowCount() > 0){
    45. 			for (int i = 0; i < viewModel->rowCount(); ++i)
    46. 				this->wnui.wholeNameView->verticalHeader()->resizeSection(i,20);
    47. 			for (int i = 0; i < 7; ++i)
    48. 				wnui.wholeNameView->resizeColumnToContents(i);
    49. 		}
    50. 	}
    51. }
    52.  
    53. void wholenamedlg::copyVALUES(const QModelIndex &QMI) {
    54. 	QVariant value = this->wnui.wholeNameView->model()->data(QMI,0);
    55. 	if (value.isValid()) {
    56. 		if (QMI.column() == 0)
    57. 			this->resultPropID =  value.toString();
    58. 		if (QMI.column() == 1)
    59. 			this->resultSSN =  value.toString();	
    60. 	}
    61. }
    To copy to clipboard, switch view to plain text mode 
    "wholeNameView" is the name given in the Designer to the tableview grid containing the data being displayed.

    Here is the main class for the homestead application. The segment shown displays that part of the searchALL() function which calls the wholenamedlg dialog.
    Qt Code: 
    1. /*
    2. Program:	homestead.cpp
    3. Description:	Homestead Application Program (HAP)
    4. Author:		Jerry L Kreps
    5. Date:		11/1/2005
    6. */
    7. #include "homestead.h"
    8. #include "wholenamedlg.h"
    9. ...
    10. homestead::homestead(QWidget *parent) : QMainWindow(parent) {
    11. 	// homestead constructor method
    12. 	ui.setupUi(this);  // draw the gui interface
    13. 	this->Year65 = 1940;  // set birth year for 65 year olds
    14. 	this->dbYear = "2006";
    15. ...
    16.  
    17. 	connect(ui.btnSearch, SIGNAL(clicked()), this, SLOT(searchAll()));
    18. ...
    19. ...
    20. } // end of the homestead constructor
    21.  
    22. void homestead::searchAll() {
    23. 	// user enters value to search for in search text box
    24. 	// and clicks the radio button indicating its data type
    25.         // then clicks the search button
    26. 	bool foundProp = false;
    27. 	bool foundPers = false;
    28. 	QString queryStr = "";
    29. 	QString seekWN = "'";  // set up for possible wholename search
    30. 	QString requestString;
    31. 	requestString = "Searching for: ";
    32. 	requestString.append(ui.leSearch->text()); // echo search request
    33. 	if (ui.rbWholeName->isChecked()) {
    34. 		QString partialName = ui.leSearch->text().trimmed();
    35. 		if (partialName.contains('%')){
    36. 			//select proprty_id,ssn,wholename,sssn,sname,city,address from persinfo_2006
    37. 			//WHERE wholename LIKE 'MILLER/E%'  ORDER BY wholename
    38. 			wholenamedlg dlg(this, partialName, this->dbYear, "F");
    39. 			if( dlg.exec() == QDialog::Accepted ){
    40. 				QString strSSN = dlg.resultSSN.trimmed();
    41. 				QString strPropID = dlg.resultPropID.trimmed();
    42. 				// was ssn returned from dialog ?
    43. .....
    44. ..... snip lot's of code .....
    45. .....
    To copy to clipboard, switch view to plain text mode 
    Here is what the dialog looks like in action:
    wholenamedlg_shown.jpg
    Last edited by GreyGeek; 13th January 2006 at 15:11.
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